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Flights to Ontario

$36 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 5/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United States to Ontario

Cheap round-trip flights

Recommended round-trip deals departing in the coming months from the most popular airlines that fly to Ontario.

Cheap one-way flights

Only flying one-way? Below are some of the best one-way flight deals to Ontario found on KAYAK recently.

Cheap last minute flights

Leaving soon but still want a bargain? Check out these latest deals for last minute flights to Ontario.

Cheap direct flights

The latest deals for direct flights to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals to Ontario

Find recent round-trip train or bus tickets from the United States to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$40Frontier
Find Deal
Sun, Jan 26 - Mon, Jan 27
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
$41Frontier
Find Deal
Fri, Feb 21 - Fri, Feb 28
9:15 pm - 10:45 pmSFO-ONT
1h 30mnonstop
6:00 am - 7:29 amONT-SFO
1h 29mnonstop
$57United Airlines
Find Deal
Fri, Mar 7 - Sun, Mar 9
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$117United Airlines
Find Deal
Tue, Jan 28 - Tue, Feb 4
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
4:05 pm - 7:00 pmONT-SEA
2h 55mnonstop
$137Delta
Find Deal
Sat, Feb 1 - Wed, Feb 5
8:05 pm - 10:39 pmSEA-ONT
2h 34mnonstop
6:00 am - 8:54 amONT-SEA
2h 54mnonstop
$141Alaska Airlines
Find Deal
Fri, Jan 24 - Wed, Jan 29
10:00 am - 5:04 pmSEA-ONT
7h 04m1 stop
4:06 pm - 6:59 pmONT-SEA
2h 53mnonstop
$146Alaska Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
12:40 pm - 3:25 pmSEA-ONT
2h 45mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$157Delta
Find Deal
Thu, Jan 23 - Sun, Jan 26
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
6:00 am - 11:02 amONT-DFW
3h 02mnonstop
$189American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
2:27 pm - 6:24 pmDEN-ONT
4h 57m1 stop
4:25 pm - 10:00 pmONT-DEN
4h 35m1 stop
$207American Airlines
Find Deal
Fri, Feb 7 - Tue, Feb 11
8:32 am - 9:54 amSFO-ONT
1h 22mnonstop
$36Frontier
Find Deal
Sat, May 17
10:15 pm - 11:47 pmDEN-ONT
2h 32mnonstop
$36Frontier
Find Deal
Wed, Jan 22
7:00 pm - 8:29 pmSFO-ONT
1h 29mnonstop
$59United Airlines
Find Deal
Thu, Jan 30
4:35 pm - 6:04 pmSFO-ONT
1h 29mnonstop
$69United Airlines
Find Deal
Tue, Jan 7
5:40 pm - 8:13 pmSEA-ONT
2h 33mnonstop
$69Alaska Airlines
Find Deal
Tue, Jan 28
11:36 am - 5:04 pmSEA-ONT
5h 28m1 stop
$78Alaska Airlines
Find Deal
Tue, Jan 28
9:24 pm - 10:45 pmDFW-ONT
3h 21mnonstop
$90American Airlines
Find Deal
Tue, Jan 28
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
$91American Airlines
Find Deal
Wed, Jan 29
6:10 pm - 11:45 pmDEN-ONT
6h 35m1 stop
$108Delta
Find Deal
Tue, Apr 1
5:30 am - 11:36 amDFW-ONT
8h 06m1 stop
$118Delta
Find Deal
Tue, Mar 11
5:32 pm - 6:57 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$141Frontier
Find Deal
Thu, Jan 2 - Sun, Jan 12
10:29 pm - 11:59 pmDEN-ONT
2h 30mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$145Frontier
Find Deal
Sat, Jan 4 - Tue, Jan 7
7:55 pm - 10:42 pmSEA-ONT
2h 47mnonstop
4:05 pm - 7:00 pmONT-SEA
2h 55mnonstop
$281Delta
Find Deal
Sat, Jan 4 - Thu, Jan 9
2:31 pm - 5:09 pmSEA-ONT
2h 38mnonstop
7:00 am - 12:51 pmONT-SEA
5h 51m1 stop
$291Alaska Airlines
Find Deal
Sat, Jan 4 - Fri, Feb 7
5:00 pm - 7:38 pmSEA-ONT
2h 38mnonstop
7:00 am - 12:46 pmONT-SEA
5h 46m1 stop
$311Alaska Airlines
Find Deal
Sat, Jan 4 - Sun, Jan 19
8:25 am - 9:58 amSFO-ONT
1h 33mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$361United Airlines
Find Deal
Wed, Jan 1 - Tue, Feb 4
2:47 pm - 5:27 pmSEA-ONT
2h 40mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$362Delta
Find Deal
Sat, Jan 4 - Tue, Jan 21
9:27 pm - 11:00 pmSFO-ONT
1h 33mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$371United Airlines
Find Deal
Thu, Jan 2 - Wed, Jan 8
12:55 pm - 6:25 pmJFK-ONT
8h 30m1 stop
12:45 pm - 10:59 pmONT-JFK
7h 14m1 stop
$484American Airlines
Find Deal
Fri, Jan 3 - Mon, Jan 6
9:00 am - 6:25 pmJFK-ONT
12h 25m2 stops
10:18 pm - 9:53 amONT-JFK
8h 35m1 stop
$489American Airlines
Find Deal
Tue, Dec 31 - Mon, Jan 6
10:03 pm - 11:31 pmSFO-ONT
1h 28mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$48Frontier
Find Deal
Fri, Jan 24 - Mon, Feb 3
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$50Frontier
Find Deal
Fri, Jan 10 - Mon, Jan 13
9:15 pm - 10:45 pmSFO-ONT
1h 30mnonstop
6:00 am - 7:29 amONT-SFO
1h 29mnonstop
$57United Airlines
Find Deal
Fri, Mar 7 - Sun, Mar 9
7:00 pm - 8:29 pmSFO-ONT
1h 29mnonstop
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
$117United Airlines
Find Deal
Thu, Jan 30 - Fri, Jan 31
3:40 pm - 6:12 pmSEA-ONT
2h 32mnonstop
4:06 pm - 6:59 pmONT-SEA
2h 53mnonstop
$137Alaska Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
8:05 pm - 10:39 pmSEA-ONT
2h 34mnonstop
6:00 am - 8:54 amONT-SEA
2h 54mnonstop
$141Alaska Airlines
Find Deal
Fri, Jan 24 - Wed, Jan 29
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$158Delta
Find Deal
Thu, Jan 23 - Sun, Jan 26
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$177Delta
Find Deal
Wed, Feb 19 - Sat, Feb 22
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
7:00 am - 12:02 pmONT-DFW
3h 02mnonstop
$179American Airlines
Find Deal
Tue, Jan 28 - Tue, Feb 4
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
6:00 am - 11:02 amONT-DFW
3h 02mnonstop
$189American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1

See travel insights to Ontario from

Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from United States to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $255. If you aren’t able to travel during the month of January, then book flights to Ontario from United States during September instead. Flights to Ontario in September, while not as cheap as those in January, still average around $298.

What is the absolute cheapest flight to Ontario?

In the past two weeks, users have booked deals to Ontario for $44/person, which is 89% cheaper than the average flight to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.
See prices from:

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $355. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from United States to Ontario for around $448.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from United States to Ontario when you can find flight prices for as low as $334. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $392 on average. Flights to Ontario from United States in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

Most flyers found that booking tickets 54 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $372. However, in the past 72 hours, people saw flights from United States for as low as $131.

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

$36

Best Round-Trip Price

$40

Fastest flight time

1h 22m

Popular in

February
The best one-way flight price to Ontario from United States in the last 72 hours is $36 (San Francisco to Ontario).
The best round-trip flight price to Ontario from United States in the last 72 hours is $40 (San Francisco to Ontario).
The fastest flight to Ontario from United States takes 1h 22m (San Francisco to Ontario).
February has the highest demand for flights to Ontario, with a 16% price increase on average.

Frequently asked questions about flying to Ontario

Is there an alternative airport near Ontario?

Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to Ontario Airport (3 mi from Ontario city center), Santa Ana J. Wayne/Orange Cnty Airport (29 mi from Ontario city center), Long Beach Municipal Airport (33 mi from Ontario city center) or Burbank Bob Hope Airport (42 mi from Ontario city center).

Is there a cheaper alternative to flying into Ontario?

Prices vary based on where travelers are departing from, but on average, the cheapest airport to fly to in Ontario is Long Beach Municipal Airport where the average price is $342. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ontario Airport?

Prices for flights to Ontario Airport refresh daily.

How many operators does momondo search for flights to Ontario Airport?

How old do you have to be to fly to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.


Why use momondo?

Why should I use momondo to find a flight deal to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as filter your options to help you make an informed choice when booking flights to Ontario.

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to Ontario and let you know when they change.


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Cheapest flight routes to Ontario

These routes have the cheapest flights to Ontario found by momondo users in United States
DepartingDestinationBest TimeBest Price
Las VegasOntario1h 03m$38
San FranciscoOntario1h 22m$38
DenverOntario2h 15m$58
Santa RosaOntario1h 26m$76
PortlandOntario2h 14m$78
SeattleOntario2h 37m$88
HoustonOntario3h 21m$94
DallasOntario3h 03m$102
Salt Lake CityOntario1h 49m$103
PhoenixOntario1h 12m$106
San JoseOntario1h 15m$106
ChicagoOntario4h 15m$108
AustinOntario3h 20m$118
MinneapolisOntario5h 24m$118
New YorkOntario5h 55m$122
Washington, D.C.Ontario7h 27m$126